how to convert analog signal to digital signal

What is the Difference Between Digital and Analog Signals? - A computer performs its tasks by turning on and off a series of electronic switches represented by the numerical digits of 0 and 1. A 0 is the code for off, and a 1 is the code for on. Combinations ..

A computer performs its tasks by turning on and off a series of electronic switches represented by the numerical digits of 0 and 1. A 0 is the code for off, and a 1 is the code for o..

Mediators amplify the signal in an expanding cascade of response. A single -subunit of insulin receptor, for example, activates many molecules of DG, and each protein kinase C molecule activated by DG will, in turn, activate many other enzyme molecules. DG and IP 3 are examples of secon..

A digital message is an ordered sequence of symbols selected from a finite set of discrete elements. Examples of digital messages are: (i) letters printed on this page (ii) listing of hourly temperature readings (iii) the keys you press at a computer terminal. Whether the messa..

. If the mathematical sums do not match, the modems communicate with each other by resending the missing segments of data. Modems also have special circuitry that allows them to compress digital signals before modulating them and then decompressing them after demodulating the ..

The 'modem' is a contraction of the term modulator-demodulator. It is a conversion that facilitates the transmission and reception of the data over the public switched telephone network (PSTN). The data of interest may be digital signals generated by computers or service provide..

The disadvantages associate with digital communication systems include (i) Increased transmission (ii) Increased system complexity Although digital communication is becoming increasingly attractive for practical use, it is a fact that analog communication systems are ..

The simplest approach to the design of modems is to treat the entire PSTN as a linear analog network. [Note that PSTN is almost entirely due to the use of pulse-code modulation (PCM) for the transmission of voice signals.]..

In this type of modulation, E c , w c are kept constant. The phase angle q of the carrier wave is varied according to the modulating wave. The common name for "phase modulation" and "frequency modulation" is "angle modulation". The digital transmission of analog signa..

. The ground station converts the received signal with the help of digital international conversion equipment to the local standard before relaying it. Frequency modulation is used for both 'up channel' and 'down channel' transmission. Though FM needs a larger bandwidt..